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# System prepended metadata

title: Cliques

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# Cliques

See also [flow motifs](/5Rik3kRLQh6Cq327BBJnPw).

In graph theory [cliques](https://en.wikipedia.org/wiki/Clique_(graph_theory)) are sub-groups in which all members are connected to each other. Cliques within the club as a fraction of the possible number (given by $2^N-N-1$; see [Reed's law](https://en.wikipedia.org/wiki/Reed's_law)).